changes in coxph in "survival" from older version?
It's worse if the model does converge because then you don't have a warning about the result being nonsense. Frank
Terry Therneau-2 wrote:
-- begin included message --- I did realize that there are way more predictors in the model. My initial thinking was use that as an initial model for stepwise model selection. Now I wonder if the model selection result is still valid if the initial model didn't even converge? --- end inclusion --- You have 17 predictors with only 22 events. All methods of "variable selection" in such a scenario will give essentially random results. There is simply not enough information present to determine a best predictor or best subset of predictors. Terry Therneau
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----- Frank Harrell Department of Biostatistics, Vanderbilt University -- View this message in context: http://r.789695.n4.nabble.com/changes-in-coxph-in-survival-from-older-version-tp3516101p3530024.html Sent from the R help mailing list archive at Nabble.com.